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Multiple Choice
What is the primary function of the pulmonary circuit in lung physiology?
A
To remove carbon dioxide from the bloodstream
B
To deliver nutrients to lung tissues
C
To regulate blood pressure in the systemic circulation
D
To transport oxygenated blood from the lungs to the heart
Verified step by step guidance
1
Understand the role of the pulmonary circuit in the circulatory system. The pulmonary circuit is responsible for transporting blood between the heart and the lungs.
Recognize that the primary function of the pulmonary circuit is gas exchange. It carries deoxygenated blood from the heart to the lungs and returns oxygenated blood back to the heart.
Identify the process of gas exchange in the lungs. In the alveoli, oxygen from inhaled air diffuses into the blood, while carbon dioxide from the blood diffuses into the alveoli to be exhaled.
Clarify that the pulmonary circuit's main purpose is to ensure that oxygenated blood is delivered to the heart, which then pumps it to the rest of the body.
Conclude that the primary function of the pulmonary circuit is to transport oxygenated blood from the lungs to the heart, facilitating the removal of carbon dioxide and the uptake of oxygen.